Crushing roll



Oct. 2 1926. 1,604,744

v r C- W. FINGVER CRUSHING ROLL Filed Jan. 12. 1926 Patented Get. 26,1926 I entree Pi h Y awn CARL V7. FINGER, 015 WILKESJBARRE,PENNSaYLVANIA.

CRUSHING ROLL.

Application fi1ed January 12; 1928. Serial No. 80,755.

plates or segments thereto which constitute the crushing elements.

Here'tofore in rolls provided with detachable segments or crushingelements, the latter have usually been secured by ordinary boltspassingdirectly therethrough'. Such bolts come in direct contact withthe material crushed, and if the material is of an abrasive nature, thebolts are soon worn out, and the segments become loose. The segments areusually made of manganese steel, which cannot be machined or drilled.The holes are cored, which cannot be done accurately, and the replacingof segments is made very difficult, due to differences in the boltholes.

The object of the present invention is to provide an improvedconstruction for a roll of this type, and especially to provide improvedmeans for securing the segmental crushing elements so that the boltholes therein may be dispensed with, and said elements held in fixedrelation to the body of the roll by securing the same at the ends of theroll.

In the specific embodiment of the invention herein described, the facesof the segments are beveled at the ends, and endrings, having beveledinside faces engaging the same, are held together by means of tie rodsor bolts extending longitudinally through the body of the roll. Sincethe manganese segments cannot be machined, and smooth surfaces must besecured by grinding, any inequality or roughness is taken care of bylayers of rubber or similar material between the segments and the bodyportion of the roll. To prevent the segments from moving on the rollbody, a projection is cast on the inner face of each segment, near thecenter thereof, to fit a corresponding cored hole in the roll body.

The specific construction of the invention and the advantages. thereofwill be more clearly explained in connection with the accompanyingdrawing, which illustrates the same in its preferred form.

In the drawing:

Figure l is a central longitudinal section through the roll.

Figure 2 is a transverse section thereof.

The roll, constituting the subject matter of the invention, comprises a'drum-shaped body portion 5, having ends 6 which are keyed to a shaft 7.The outer face of the body 5 has a circumferential raised portion 8midway between its ends, which forms a seat against which rest thecorresponding raised inner surfaces 9 of the segments 10, constitutingthe crushing element. These seg ments are arranged in juxtaposedrelation surrounding the drum 5, and are formed with outwardlyprojecting teeth '11.

Each segment 10 is formed centrally with an inwardly projecting lug 19,which fits into a corresponding cored hole 13 in the drum. Thispositively prevents circumferential movement of the segments withrespect to the drum, while they are held against radial movement by apair of end elements 1 1, which are held together by longitudinal tierods 15 passing through the body portion of the roll. Each end member14L is formed with rim 16, having an inside beveled surface which fitsover the correspondingly beveled end portion 17 of the seg ments 10. Theend members 14:, therefore when drawn. inwardly, serve to clamp thejuxtaposed segments 10 accurately in fixed relation to the drum.

The segments are, as above stated, made of manganese steel or similaralloy, and in order to avoid the time and expense of grinding the sameto provide smooth surfaces, a thin strip 18 of elasticmaterial may besecured between the rim 16 and the adjacent beveled ends 1'? of thesegments, and bands 19 of similar material may be secured between theinner surfaces of the segments and the adjacent surface of the drum. Theuse of these cushioning strips, however, is optional.

From the foregoing description, it will be seen that as a result of thisinvention, the construction of the segments is greatly simplified, andthey may be made with correspondingly less expense; The danger of thesegments becoming loose is practically eliminated. At the same time,when the segments are worn out, they may be easily and quickly replaced.

While I have shown and described in detail the specific construction ofthe invention in its preferred form, it is to be'understood that thisismerely for the purpose of illustration, and that various modificationsmay be made in the form and arrangement of the various features withoutany material departure from the salient features of the invention as setforth in the claims.

What is claimed is:

l. A crushing roll comprising a body portion, a series of detachablesegmental elements surrounding the body portion and formed with inwardlyprojecting lugs, said body portion having holes receiving said lugs toprevent circumferential movementof said elements with respect to thebody portion, apair of end members at opposite ends of the roll, and tierods passing longitudinally through the body portion and holdingsaid endmembers in clamping relation to said segmental elements.

2. A crushing roll comprising a drum, a series of segmental elementssurrounding the drum and having integral inwardly projecting lugs, saiddrum having radial holes receiving said lugs to prevent circumferentialmovement of said elements with respect to the drum, said segmentalelements having heir ends beveled, a pair of end pieces having rimsformed with inner faces correspondingly beveled to fit over therespective ends of the segmental elements, and tie rods passinglongitudinally through the drum and holding said end members in clampingrelation to said segmental elements.

3. A crushing roll comprising a body portion, a series of detachablesegmental elements surounding the body portion, said body portion andthe respective segmental elements having co-engaging raised surfacessubstantially midway of the length thereof, one surface having lugprojecting therefrom and the other having a corresponding portion cutaway to receive the lug, whereby to positively prevent circumferentialmovement of said segmental elements with respect to said body portion,elastic cushioning strips between the body portion and the respectivesegmental elements near the ends thereof, a pair of end members atopposite endsof' the roll, and tie rods passing longitudinally throughthe body portion and holding said end members in clamping relation tothe segmental elements.

i. A crushing roll comprising a cylindrical body portion, a series ofjuxtaposed detachable segmental elements surrounding the body portion, apair of end members at opposite ends of the roll and spaced from thebody portion, and tie rods passing longitudi nally through the bodyportion and holding said end members in clamping relation to saidsegmental elements, said body portion and said segmental elements havinginterengaging portions substantially midway of the length of the rollwhich prevent relative circumferential movement of said elements withrespect to the body portion.

A crushing roll comprising a drum, a series of segmental elementssurrounding the drum and having their ends beveled, a pair of end piecesspaced from the ends of the drum and having rims formed With inner facescorrespondingly beveled to fit over the respective ends of the segmentalelements, tie rods passing longitudinally through the drum and holdingsaid end members in clamping relation to the segmental elements, andintcrengaging means formed on the drum and segmental elementsrespectively midway their length and positively preventing movement ofone relative to the other.

5. A crushing roll comprising a drum formed with a circumferentialraised surface substantially midway between its ends, a series ofsegmental elements surrounding the drum and formed with inner raisedsurfaces between their ends seating against the raised surface on thedrum, a pair of end members at opposite ends of the roll, and tie rodspassing longitudinally through the drum and holding said end members inclamping relation to the segmental elements, the raised surfaces on thedrum and segmental elements having interlocking means to preventrelative circumferential movement of said elements with respect to thedrum.

In testimony that I claim the foregoing as my own I have hereto atliXedmy signature.

CARL W. FINGER.

